diff options
| author | kazu <kazu@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-02-21 19:47:40 +0000 |
|---|---|---|
| committer | kazu <kazu@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-02-21 19:47:40 +0000 |
| commit | 251102fec8348b733b9f8e0b2b3e54f9b8a19f7c (patch) | |
| tree | 5527b039f988d6e0b9585b5f8a80477d6ee437bc /gcc/flow.c | |
| parent | 9677695f0f925e9a1a63365d125cc81c4eadbf06 (diff) | |
| download | gcc-251102fec8348b733b9f8e0b2b3e54f9b8a19f7c.tar.gz | |
* flow.c (delete_dead_jumptables): Speed up by scanning insns
that do not belong to any basic block.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@95342 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/flow.c')
| -rw-r--r-- | gcc/flow.c | 40 |
1 files changed, 27 insertions, 13 deletions
diff --git a/gcc/flow.c b/gcc/flow.c index 172541d2fa5..d3850cc9618 100644 --- a/gcc/flow.c +++ b/gcc/flow.c @@ -817,21 +817,35 @@ delete_noop_moves (void) void delete_dead_jumptables (void) { - rtx insn, next; - for (insn = get_insns (); insn; insn = next) + basic_block bb; + + /* A dead jump table does not belong to any basic block. Scan insns + between two adjacent basic blocks. */ + FOR_EACH_BB (bb) { - next = NEXT_INSN (insn); - if (LABEL_P (insn) - && LABEL_NUSES (insn) == LABEL_PRESERVE_P (insn) - && JUMP_P (next) - && (GET_CODE (PATTERN (next)) == ADDR_VEC - || GET_CODE (PATTERN (next)) == ADDR_DIFF_VEC)) + rtx insn, next; + + for (insn = NEXT_INSN (BB_END (bb)); + insn && !NOTE_INSN_BASIC_BLOCK_P (insn); + insn = next) { - if (dump_file) - fprintf (dump_file, "Dead jumptable %i removed\n", INSN_UID (insn)); - delete_insn (NEXT_INSN (insn)); - delete_insn (insn); - next = NEXT_INSN (next); + next = NEXT_INSN (insn); + if (LABEL_P (insn) + && LABEL_NUSES (insn) == LABEL_PRESERVE_P (insn) + && JUMP_P (next) + && (GET_CODE (PATTERN (next)) == ADDR_VEC + || GET_CODE (PATTERN (next)) == ADDR_DIFF_VEC)) + { + rtx label = insn, jump = next; + + if (dump_file) + fprintf (dump_file, "Dead jumptable %i removed\n", + INSN_UID (insn)); + + next = NEXT_INSN (next); + delete_insn (jump); + delete_insn (label); + } } } } |